公开(公告)号：US20130153782A1

公开(公告)日：2013-06-20

申请号：US13464261

申请日：2012-05-04

Applicant: Weiming Ren ,  Zhongwei Chen

Inventor： Weiming Ren ,  Zhongwei Chen

IPC: H01J3/20 ,  H01F7/02

CPC classification number: H01J37/14 ,  B82Y10/00 ,  B82Y40/00 ,  H01J3/20 ,  H01J37/141 ,  H01J37/145 ,  H01J37/3177 ,  H01J2237/1035 ,  H01J2237/1415 ,  H01J2237/31774

Abstract: The present invention provides two ways to form a special permeability-discontinuity unit inside every sub-lens of a multi-axis magnetic lens, which either has a simpler configuration or has more flexibility in manufacturing such as material selection and mechanical structure. Accordingly several types of multi-axis magnetic lens are proposed for various applications. One type is for general application such as a multi-axis magnetic condenser lens or a multi-axis magnetic transfer lens, another type is a multi-axis magnetic non-immersion objective which can require a lower magnetomotive force, and one more type is a multi-axis magnetic immersion objective lens which can generate smaller aberrations. Due to using permeability-discontinuity units, every multi-axis magnetic lens in this invention can also be electrically excited to function as a multi-axis electromagnetic compound lens so as to further reduce aberrations thereof and/or realize electron beam retarding for low-voltage irradiation on specimen.

Abstract translation: 本发明提供了在多轴磁性透镜的每个子透镜内部形成特殊的渗透率不连续单元的两种方式，其具有更简单的构造或者在诸如材料选择和机械结构的制造中具有更大的灵活性。 因此，针对各种应用提出了几种类型的多轴磁性透镜。 一种用于一般应用，例如多轴磁聚焦透镜或多轴磁性转印透镜，另一种类型是可能需要较低磁动势的多轴磁性非浸没物镜，另外一种类型是 可以产生较小像差的多轴磁浸物镜。 由于使用导磁率不连续单位，本发明中的每个多轴磁性透镜也可以被电激励以用作多轴电磁复合透镜，以便进一步降低其像差和/或实现低电压的电子束延迟 对样品照射

公开(公告)号：US08247136B2

公开(公告)日：2012-08-21

申请号：US11376768

申请日：2006-03-15

Applicant: Yushan Yan ,  Xin Wang ,  Wenzhen Li ,  Mahesh Waje ,  Zhongwei Chen ,  William Goddard ,  Wei-Qiao Deng

Inventor： Yushan Yan ,  Xin Wang ,  Wenzhen Li ,  Mahesh Waje ,  Zhongwei Chen ,  William Goddard ,  Wei-Qiao Deng

IPC: H01M4/02 ,  H01M4/36 ,  H01M4/92 ,  H01M8/00 ,  B05D5/12

CPC classification number: H01M4/881 ,  H01M4/8605 ,  H01M4/92 ,  H01M4/926 ,  H01M8/1004 ,  H01M8/1011 ,  Y02E60/523

Abstract: Novel proton exchange membrane fuel cells and direct methanol fuel cells with nanostructured components are configured with higher precious metal utilization rate at the electrodes, higher power density, and lower cost. To form a catalyst, platinum or platinum-ruthenium nanoparticles are deposited onto carbon-based materials, for example, single-walled, dual-walled, multi-walled and cup-stacked carbon nanotubes. The deposition process includes an ethylene glycol reduction method. Aligned arrays of these carbon nanomaterials are prepared by filtering the nanomaterials with ethanol. A membrane electrode assembly is formed by sandwiching the catalyst between a proton exchange membrane and a diffusion layer that form a first electrode. The second electrode may be formed using a conventional catalyst. The several layers of the MEA are hot pressed to form an integrated unit. Proton exchange membrane fuel cells and direct methanol fuel cells are developed by stacking the membrane electrode assemblies in a conventional manner.

Abstract translation: 新型质子交换膜燃料电池和具有纳米结构组分的直接甲醇燃料电池配置在电极上的贵金属利用率更高，功率密度更高，成本更低。 为了形成催化剂，将铂或铂 - 钌纳米颗粒沉积在碳基材料上，例如单壁，双壁，多壁和杯堆叠碳纳米管。 沉积工艺包括乙二醇还原法。 通过用乙醇过滤纳米材料来制备这些碳纳米材料的对准阵列。 通过将催化剂夹在质子交换膜和形成第一电极的扩散层之间形成膜电极组件。 第二电极可以使用常规的催化剂形成。 MEA的几层被热压形成一个集成的单元。 质子交换膜燃料电池和直接甲醇燃料电池通过以常规方式堆叠膜电极组件来开发。

公开(公告)号：US20080121810A1

公开(公告)日：2008-05-29

申请号：US11923012

申请日：2007-10-24

Applicant: Xuedong Liu ,  Xu Zhang ,  Joe Wang ,  Edward Tseng ,  Zhongwei Chen

Inventor： Xuedong Liu ,  Xu Zhang ,  Joe Wang ,  Edward Tseng ,  Zhongwei Chen

IPC: H01J1/50

CPC classification number: H01J37/145 ,  H01J37/28 ,  H01J2237/0475 ,  H01J2237/12 ,  H01J2237/14 ,  H01J2237/24485 ,  H01J2237/2807

Abstract: System and method for charged particle beam. According an embodiment, the present invention provides a charged particle beam apparatus. The apparatus includes a charged particle source for generating a primary charged particle beam. The apparatus also includes at least one condenser lens for pre-focusing the primary charge particle beam. Furthermore, the apparatus includes a compound objective lens for forming the magnetic field and the electrostatic field to focus the primary charged particle beam onto a specimen in the charged particle beam path. The specimen includes a specimen surface. The compound objective lens includes a conical magnetic lens, an immersion magnetic lens, and an electrostatic lens, the conical magnetic lens including an upper pole piece, a shared pole piece being electrically insulated from the upper pole piece, and an excitation coil.

Abstract translation: 带电粒子束的系统和方法。 根据实施例，本发明提供一种带电粒子束装置。 该装置包括用于产生初级带电粒子束的带电粒子源。 该装置还包括用于预聚焦初级充电粒子束的至少一个聚光透镜。 此外，该装置包括用于形成磁场的复合物镜和静电场，以将初级带电粒子束聚焦到带电粒子束路径中的样本上。 样品包括样品表面。 复合物镜包括锥形磁性透镜，浸没式磁透镜和静电透镜，该圆锥形磁性透镜包括上极片，与上极片电绝缘的共用极片和励磁线圈。

公开(公告)号：US11593938B2

公开(公告)日：2023-02-28

申请号：US17452999

申请日：2021-10-31

Applicant: Zhongwei Chen ,  Xiaoming Chen ,  Daniel Tang ,  Liang-Fu Fan

Inventor： Zhongwei Chen ,  Xiaoming Chen ,  Daniel Tang ,  Liang-Fu Fan

IPC: G06T7/00 ,  G06T7/50 ,  H01J37/28

Abstract: A rapid and automatic virus imaging and analysis system includes (i) electron optical sub-systems (EOSs), each of which has a large field of view (FOV) and is capable of instant magnification switching for rapidly scanning a virus sample; (ii) sample management sub-systems (SMSs), each of which automatically loads virus samples into one of the EOSs for virus sample scanning and then unloads the virus samples from the EOS after the virus sample scanning is completed; (iii) virus detection and classification sub-systems (VDCSs), each of which automatically detects and classifies a virus based on images from the EOS virus sample scanning; and (iv) a cloud-based collaboration sub-system for analyzing the virus sample scanning images, storing images from the EOS virus sample scanning, and storing and analyzing machine data associated with the EOSs, the SMSs, and the VDCSs.

公开(公告)号：US11569059B2

公开(公告)日：2023-01-31

申请号：US17644789

申请日：2021-12-17

Applicant: Zhongwei Chen ,  Xiaoming Chen ,  Daniel Tang ,  Liang-Fu Fan

Inventor： Zhongwei Chen ,  Xiaoming Chen ,  Daniel Tang ,  Liang-Fu Fan

IPC: H01J37/26 ,  B08B7/00 ,  H01J37/244

Abstract: The present invention provides an apparatus of charged-particle beam e.g. an electron microscope comprising an in-column plasma generator for selectively cleaning BSE detector and BF/DF detector. The plasma generator is located between a lower pole piece of objective lens and the BF/DF detectors, but outside trajectory area of the charged-particles from the sample stage to the BF/DF detector.

公开(公告)号：US11355312B2

公开(公告)日：2022-06-07

申请号：US17444192

申请日：2021-08-01

Applicant: Zhongwei Chen ,  Xiaoming Chen ,  Daniel Tang ,  Liang-Fu Fan

Inventor： Zhongwei Chen ,  Xiaoming Chen ,  Daniel Tang ,  Liang-Fu Fan

IPC: H01J37/28 ,  H01J37/20 ,  H01J37/317 ,  H01J37/141

Abstract: The present invention provides a driving system comprising two actuators for moving a stage through two elastic connectors; and a general apparatus/device comprising such a driving system, such as a machine tool, an analytical instrument, an optical microscope, and an apparatus of charged-particle beam such as electron microscope and an electron beam lithographical apparatus. When used in an electron microscope, the stage can be used as a specimen stage or a plate having apertures for electron beam to pass through. The novel stage driving system exhibits numerous technical merits such as simpler structure, better manufacturability, improved cost-effectiveness, and higher reliability, among others.

公开(公告)号：US20220108867A1

公开(公告)日：2022-04-07

申请号：US17305514

申请日：2021-07-08

Applicant: Zhongwei Chen ,  Xiaoming Chen ,  Daniel Tang ,  Liang-Fu Fan

Inventor： Zhongwei Chen ,  Xiaoming Chen ,  Daniel Tang ,  Liang-Fu Fan

IPC: H01J37/244 ,  H01J37/28 ,  H01J37/22

Abstract: The present invention provides a digital high-resolution detector for detecting X-ray, UV light or charged particles. In various embodiments, the digital detector comprises an array of CMOS or CCD pixels and a layer of conversion material on top of the array designed for converting incident X-ray, UV light or charged particles into photons for CMOS or CCD sensors to capture. The thin and high-resolution detector of the invention is particularly useful for monitoring and aligning beams in, and optimizing system performance of, an apparatus of charged-particle beam e.g. an electron microscope.

公开(公告)号：US09590253B2

公开(公告)日：2017-03-07

申请号：US13941139

申请日：2013-07-12

Applicant: Zhongwei Chen ,  Zhu Chen

Inventor： Zhongwei Chen ,  Zhu Chen

IPC: H01M4/90 ,  H01M4/86 ,  H01M4/96 ,  H01M12/06

CPC classification number: H01M4/9016 ,  H01M4/8615 ,  H01M4/96 ,  H01M12/06 ,  Y02E60/50

Abstract: The present invention relates to a bifunctional catalyst for use with air metal batteries and fuel cell. The bifunctional catalyst comprising a core and a shell, where the core comprises a metal oxide and the shell comprises a carbon nanostructure. In a further aspect the bifunctional catalyst is catalytically active for oxygen reduction and oxygen evolution reactions.

Abstract translation: 本发明涉及一种用于空气金属电池和燃料电池的双功能催化剂。 包含核和壳的双功能催化剂，其中芯包含金属氧化物，壳包含碳纳米结构。 在另一方面，双功能催化剂对氧还原和析氧反应具有催化活性。

公开(公告)号：US09581245B2

公开(公告)日：2017-02-28

申请号：US13437107

申请日：2012-04-02

Applicant: Qingpo Xi ,  Tao Li ,  Feng Cao ,  Fumin He ,  Zhongwei Chen

Inventor： Qingpo Xi ,  Tao Li ,  Feng Cao ,  Fumin He ,  Zhongwei Chen

IPC: F16L23/20 ,  F16J15/08

CPC classification number: F16J15/0881 ,  F16L23/20

Abstract: A metal seal flange assembly for a vacuum system is presented. Its metal gasket has a crossectional shape that is an irregular hexagon with two acute angles between the longest side and the second- and third-longest sides, respectively. The longest side of the irregular hexagon is the vertical inner wall of the metal gasket. This design can reduce the normal force required to seal the metal seal flange assembly and reduce the number of bolts needed, enabling use in a limited working space.

Abstract translation: 提出了一种用于真空系统的金属密封法兰组件。 其金属垫片的横截面形状是不规则六边形，分别在最长侧和第二和第三最长边之间具有两个锐角。 不规则六边形的最长边是金属垫片的垂直内壁。 这种设计可以减少密封金属密封凸缘组件所需的法向力，并减少所需的螺栓数量，从而在有限的工作空间中使用。

公开(公告)号：US20150349325A1

公开(公告)日：2015-12-03

申请号：US14654256

申请日：2013-12-20

Applicant: Zhongwei CHEN ,  Dong Un LEE ,  Woong Hey PARK ,  Kun FENG

Inventor： Zhongwei Chen ,  Dong Un Lee ,  Hey Woong Park ,  Kun Feng

IPC: H01M4/04 ,  H01M4/86 ,  H01M12/08 ,  H01M4/88

CPC classification number: H01M4/0497 ,  C30B7/14 ,  C30B29/16 ,  C30B29/60 ,  H01M4/0471 ,  H01M4/8615 ,  H01M4/88 ,  H01M4/8803 ,  H01M4/8825 ,  H01M4/9016 ,  H01M12/08

Abstract: A method of producing a bi-functional electrode for a metal-air battery or fuel cell comprises growing metal oxide nanowires directly on a metal support using a chemical deposition process. Preferably, the chemical process comprises an ammonium evaporation process. The metal support is preferably a porous metal structure, such as a metal mesh or foam. The metal oxide nanowires are formed of any transition metal or mixed transition metal. Preferably, the nanowires comprise cobalt oxide nanowires.

Abstract translation: 制造金属 - 空气电池或燃料电池用双功能电极的方法包括使用化学沉积工艺在金属载体上直接生长金属氧化物纳米线。 优选地，化学方法包括铵蒸发方法。 金属载体优选为多孔金属结构，例如金属网或泡沫。 金属氧化物纳米线由任何过渡金属或混合过渡金属形成。 优选地，纳米线包括氧化钴纳米线。